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HEF4794B
Datasheet
General description
The HEF4794B is an 8-stage serial shift register. It has a storage latch associated with each stage for strobing data from the serial input (D) to the parallel LED driver outputs (QP0 to QP7). Data is shifted on the positive-going clock (CP) transitions. The data in each shift register stage is transferred to the storage register when the strobe input (STR) is HIGH. Data in the storage register appears at the outputs whenever the output enable input (OE) signal is HIGH.
Two serial outputs (QS1 and QS2) are available for cascading a number of HEF4794B devices. Serial data is available at QS1 on positive-going clock edges to allow high-speed operation in cascaded systems with a fast clock rise time. The same serial data is available at QS2 on the next negative going clock edge. This is used for cascading HEF4794B devices when the clock has a slow rise time.
It operates over a recommended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input. It is also suitable for use over both the industrial (-40 Cel to +85 Cel) and automotive (-40 Cel to +125 Cel) temperature ranges.
Features
- Fully static operation
- 5 V, 10 V, and 15 V parametric ratings
- Standardized symmetrical output characteristics
- Operates across the automotive temperature range -40 Cel to +125 Cel
- Complies with JEDEC standard JESD 13-B
- ESD protection:
- HBM JESD22-A114E exceeds 2000 V
- MM JESD22-A115-A exceeds 200 V
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| HEF4794BP | HEF4794BPN | 9350 744 80112 | Volume production | SOT38-4
(DIP16) | Tube | Standard Marking | HEF4794BP
| Always Pb-free |
| HEF4794BT | HEF4794BTD | 9350 691 40112 | Volume production | SOT109-1
(SO16) | Tube | Standard Marking | HEF4794BT
| week 12, 2005 |
| HEF4794BT | HEF4794BTD-T | 9350 691 40118 | Volume production | SOT109-1
(SO16) | Reel Pack, SMD, 13" | Standard Marking | HEF4794BT
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|
| HEF4794BP | 9350 744 80112 | 0.7600 | NA | DIGI-KEY CORPORATION | 1,088 | 11/21/2008 | Buy online | Order samples |
| NA | MOUSER ELECTRONICS | 2,900 | 11/21/2008 | Buy online | ||||
| HEF4794BT | 9350 691 40112 | 0.7600 | NA | DIGI-KEY CORPORATION | 3,312 | 11/21/2008 | Buy online | not available |
| HEF4794BT | 9350 691 40118 | 0.7600 | NA | ARROW ELECTRONICS | 105,000 | 11/21/2008 | Buy online | Order samples |
| NA | MOUSER ELECTRONICS | 2,267 | 11/21/2008 | Buy online |
Parametrics/similar products
| Type number | Package | Description | Fmax(MHz) | Propagation Delay(ns) | Voltage | No. of Pins | Power Dissipation Considerations | Logic Switching Levels | Output Drive Capability |
|---|---|---|---|---|---|---|---|---|---|
| HEF4794BP | SOT38-4
(DIP16) | 8-Stage Shift-and-Store Register LED Driver | 28 @ 15 V | 45@15V | 4.5-15.5 V | 16 | Low Power or Automotive Applications | CMOS | -20 mA |
| HEF4794BT | SOT109-1
(SO16) | 8-Stage Shift-and-Store Register LED Driver | 28 @ 15 V | 45@15V | 4.5-15.5 V | 16 | Low Power or Automotive Applications | CMOS | -20 mA |
Similar products
HEF4794B links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.
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